Draught excluders for doorways



Oct. 9, 1956 J. LAUMANN 2,765,504

DRAUGHT EXCLUDERS FOR DOORWAYS Filed Feb. 6, 1951 4 Sheets-Sheet 1 In venfor Oct. 9, 1956 J. LAUMANN 2,765,504

DRAUGHT EXCLUDERS FOR DOORWAYS Filed Feb. 6. 1951 4 Sheets-Sheet 2 J. LACIMANN Oct. 9, 1956 DERS FOR DOORWAYS DRAUGHT EXCLU 4 Sheets-Sheet 3 Filed Feb. 6, 1951 Fig. 12

lnvenfor- Oct. 9, 1956 J. LAUMANN DRAUGHT EXCLUDERS FOR DOORWAYS Filed Feb. 6 19 51 4 Sheets-Sheet 4 ln van/0r- 2,765,504 DRAUGHT EXCLUDERS FOR DOORWAYS Joseph Laumann, Essen (Ruhr), Germany Application February 6, 1951, Serial No. 209,583 Claims priority, application Germany February 6, 1950 9 Claims. (Cl. 20-68) This invention relates to a draught excluder for door-- ways.

An object of the invention is to provide a packing strip which, when the door is shut, will seal the base edge of the door in a simple manner. A further object of the invention is to provide a draught excluder which will efiiciently be operated automatically by the closing of a lock on the door.

Another object of the invention is to provide a draught excluder which will be concealed from view when the door is open.

It is known that the gap between the bottom edge of a door and the floor has a nuisance value, as the draught coming through this gap brings dirt and dust with it. It has therefore been proposed to provide an elastic packing strip for this gap. When this packing strip has been mounted on the lower edge of the door and slides over the floor, it is obvious that the opening and shutting of the door is rendered more difiicult, and in particular it is not possible to allow a carpet or a floor covering to extend into the space swept out by the door.

Draught excluder devices which have been raised vertically when opening the door and fall in a vertical plane as the door is shut, require a fairly large area of swing of the door for their operation, so that here again when laying a carpet or other floor covering on the floor, care has to be taken that it does not foul the lower door edge. Such known devices operate when pressure is applied to the door, which, however, puts a restraint on the opening and the closing of the door. The pressure for operating the lifting or sinking of the draught eXcluder device usually operates against spring pressure. Again, the draught excluder strip cannot be adapted to conditions where the floor is not wholly level, and a further disadvantage of the known draught excluding devices is that they are generally visible on the door and mar its appearance.

According to the present invention the lifting and lowering of the draught eXcluder strip is made dependent on the operation of the door lock or latch. Consequently, before the door is moved, it is free from frictional contact with the floor, and in consequence carpets and floor coverings can be laid right up to the doorway. Further, the operation of the draught excluder packing strip is independent of the opening and shutting of the door.

In the arrangement of the invention, a coupling is provided between the lock and the lifting and lowering device for the draught excluding or packing strip, so that in the door lock an abutment is provided which is only coupled with the latch on a reverse movement, and which operates the lifting gear for the packing strip, which abutment, when the door is closed, lies against the jambplate to eifectively secure the lock, but when freed, to allow the lock to operate. This results in that, when the door is closed, the lifting gear must sink, due to the latch operation of the packing strip, and when the door is open, that is to say when the abutment is free from pressure,

even after the latch has sprung out again, no sinking of the packing strip will take place by operation of the lock. The lifting device is so interconnected with the operating mechanism for the withdrawal of the latch that, prior to the edge of the latch leaving its socket in the jamb-plate, the packing strip will be lifted.

Further objects and advantages of the invention and the parts of a preferred arrangement will be described with reference to the accompanying drawings, showing various forms of construction.

In the drawings:

Fig. 1 is an elevation of a cluder thereon,

Figs. 2 to 5 show the lock in various positions,

Figs. 6 to 9 are sections on the lines II of Figs. 2 to 5, with certain parts omitted for the sake of clearness, while Figs. 10 and 11 :are sections corresponding to Figs. 8 and 9 of a modified abutment and latch arrangement,

Figs. 12 to 15 show another form of lock device,

Figs. 16 and 17 are sections on the line I-I and II-II, respectively, of Figs. 14 and 15, which show the latch position,

Fig. 18 is a jamb-plate in side view,

Fig. 19 shows the draught excluder packing strip inserted in a door edge and its suspension, in sectional elevation,

Fig. 20 is an end cross-sectional view through the draught excluder strip,

Fig. 21 is a detail view of with the lock.

As shown in Fig. 1, the lower edge of the door opposite the floor is provided with a draught eXcluder packing strip, the lifting and lowering of which is eifected by a cable 1 connected to the door lock.

For this purpose, as shown in Figs. 1 and 2, the lock is provided with a lifting device for the draught excluder packing strip provided with locking means. The lifting device consists of a two-armed lever 2, 3, pivotally mounted about the spindle 4 of the door handle, and the arm 2 of which is provided with a shackle 5 for connecting the tension cable. In known manner, the hook is connected with a turn-buckle 31 (see Fig. 21) to form adjusting means for the length of the tension cable. By screwing up the internally threaded sleeve upon the threaded spindle 32 (Fig. 21), the cable can be shortened or lengthened. The rear side 6 of the arm 3 of the lever is bevelled, and against this bevelled end rests a roller 8 on the displaceable end of a lever 7, so that when the lock is operated, the lifting device is also operated. The end of this bevelled portion is so shaped that no displacement of the lever 2, 3 takes place towards the end of the movement.

The lever 7 is pivoted above the latch 9. A pin 10 forms a link with the latch. Instead of connecting the latch by means of an eyelet, the latch can be provided with a hook, which is connected over the pin 10. The abutment 12 is displaceable in a groove in the latch-plate 11, and is displaced by the projection 13 when the latch 9 is withdrawn through the latch-plate 11.

The locking lever 14 is pivoted at 15 and displaces the abutment 12 as this is embraced between the pin 16 and the rear bent up edge 17 of the abutment, this rear edge 17 having a projection 18 sliding in a slot 19 in the latchplate to form a guide therefor. A spiral control spring 20 abuts at one end on the spindle of the lever 7 and presses the latch into its closed position, while the other arm 21 abuts against a pin on the lever 14 and tends to displace this latter.

The displaceable end of the locking lever 14 is provided with a notch 23 which corresponds to a projection 24 on the arm 2 of the lever 2, 3.

door with the draught exthe tension link connected An abutment pin 25 is further provided on the lever 7 to be engaged by the door handle lever, so that the latch is displaced by lever 7 and the door handle plate 33. The pin 26 limits the displacement of the door handle.

The roller 27 and the part 28 serve to guide the latch. Further, the roller 27 limits the turning movement of the roller lever 7 when the latch moves outwardly, and the part 28 limits the return movement of the door handle.

The operation of the lock is as follows:

If the latch 9 is drawn back by operation of the door handle plate 33 in the opening of the door, as shown in Figs. 2 and 6, the lever 7 is swung to the right by means of the door handle plate 33 and pin 25, and the latch 9 is drawn back, so that the latch-plate 11 is drawn out of the jamb-plate, The end of the latch draws back the abutment 12. As the abutment 12 moves back, the lever 14 is turned round to a further degree, so that the locking projection 24 on the lever arm 2 is removed further from the notch 23 of the locking lever 14. The roller 8 of the lever 7 moves over the rear bevelled portion 6 of the lever arm 3, and consequently swings the lever 2, 3, so that its arm 2 moves upwardly with the tension cable 1, and thus lifts the draught excluder packing strip.

When the door is shut and the latch-plate 11 and the abutment 12 extend out of the lock casing, and before the end of the latch engages in th jamb-plate 30 and the abutment with the jamb-plate projection 29, then the notch 23 of the locking lever 14 lies against the locking projection 24 of the lever arm 2. This position is shown in Figs. 3 and 7.

When the latch plate 11 has entered the jamb-plate 30, as will occur when the door is shut, the abutment 12 rests against the jamb-plate projection 29 (see the dot-dash position of the locking lever 14 in Fig. 4 and in Fig. 8) and the projection 23 will lie against the locking projection 24, so that the lever arm 2 can again move downwardly.

When the abutment 12 with the latch-plate 11 has completely moved out of the lock casing, which will happen when the door is open, which is shown in Fig. 4 with the locking lever 14 indicated in full lines, then, as shown in Fig. l0, the locking projection 24 lies in the locking notch 23, with the result that the lever arm 2 is locked against any displacement, and the draught excluder packing strip cannot sink.

As the latch-plate 11 moves out further, when the door is shut (see the position of the locking lever 14 and levers 2 and 3 shown in Fig. and in Fig. 9), the locking lever 14 is locked, as also is the abutment, in the position shown in Fig. 4 (see chain-dotted position) and as shown in Fig. 8, in which the notch 23 has not yet engaged the locking projection 24 as the abutment 12 cannot follow the lowering movement as it lies against the projection 29 of the jamb-plate. The draught excluder packing strip can therefore sink to its lowest level.

When the latch-plate 11 moves fully outwards, when the door is open (see the position shown in full lines in Fig. 5 and in Fig, 11), then the abutment 12 moves as far as possible, and the locking notch 23 engages the locking projection 24, with the result that the lever arm 2 is locked against an outward movement, and thus a lowering of the draught excluder packing strip is not possible. The roller 8 of the lever 7 is then lifted by the bevelled portion 6 of the lever arm 2.

Obviously it is possible that the lock can be provided with a key operated bolt and with an interchangeable lever for operating the latch by means of the bolt. Also the lock can be provided with a cylindrical projection, similar to known cylindrical locks. The improvements of the invention are also applicable to Chubb locks.

In the form of construction shown in Figs. 12 to 15, the locking lever 14 is made integral with the abutment 12. In order, in this case, to provide the necessary displacement movement for the abutment, a groove 34 is provided in the latch-plate 11 of corresponding width to the abutment, to allow this to extend through it. Obviously an integral formation of the abutment and locking lever is also possible in the construction shown in Figs. 2 to 5.

In Figs. 12 to 15, a locking lever has an arm 35 which projects against the pivot 10 of the latch 9 and is pro vided with a locking hook 36. The locking hook 36 co-operates with a locking cam 37 disposed underneath it on the latch 9.

The latch-plate has an inclined surface 38 more steeply inclined than in normal locks, so that the door can be pushed into the closed position more readily. The steep inclination of this inclined surface can be seen from Figs. 12 to 15, so that the abutment of the locking device need not project to so large an extent.

12 shows a position in which the latch 9 is withdrawn and the lock is out of operation. When the door handle is turned, when the door is open, as shown in Fig. 13, as a preliminary movement to its closing, then the locking projection 36, as the lever 14 is displaced, comes under the operation of the arm 21 and lies in front of the locking cam 37, as shown in Fig. 14. During a further movement of the door towards the closing position, the lever 7 and the two-armed lever 2, 3, will be locked, the arm 2 of which is connected with the tension cable 1 for the operation of the draught excluder packing strip, which cannot therefore sink.

Fig. 15 shows the position of the parts when the door is shut. The latch-plate 11 engages in the jamb-plate while the abutment 12 lies against the projection 29 of the jamb-plate, so that the lock does not come into operation and the draught excluder packing strip can sink as the lever 2, 3 is turned.

The draught excluder packing strip is mounted in a slot 42 in the lower edge of the door. It consists of a retaining rail 39, a packing strip 40 and a hollow rail 41 of rectangular cross-section for supporting the retaining rail. The hollow rail 41 is shorter than the width of the door. In the form of construction shown, it is half the width of the door. At its end, on the inside of the slot 42 on the lower edge of the door, the hollow rail is given a section to form tongues 43, which serve to receive screws for securing the hollow rail, while the end adjacent the door jamb is provided with an angle-plate part 44 for securing to the door. The flange of the angle-plate 44 lies in the plane of the slot 45, through which the tension cable 1 is guided. At the end of the hollow rail adjacent to the door jamb, a guide roller 46 for the tension cable is guided, and at the middle of the door a second guide roller 47 is provided for the end of the cable, from which the tension cable passes under the spacing cylinder or bolt 48 of the retaining rail to a hook 49 on the retaining rail for the draught excluder strip. The packing cylinder 48 lies across the rail carrying the draught excluder strip 40, and is guided in an open slot 50 of the hollow rail. The lower edge of this hollow rail is narrowed on both sides of the slot to provide an opening for the passage and removal of the tension cable.

The retaining rail 39 of the draught excluder strip 40 is of U-shape in cross-section, and is open at the top. It is guided by means of its webs in the lot 42 and presents a depressed base 51 in which a felt strip 52 is disposed with the draught excluder strip 40 lying behind it. At the door hinge end, the packing strip 40 is secured by a hook 53 which is mounted inside the retaining rail 39. The points of fastening of the draught excluder strip can be selected according to the desired length of the draught excluded strip, so that any excess length of draught excluder strip can be cut off as desired. When the supporting rail is shortened, the closing piece 55 can be pushed into it. The other end of the draught excluder strip is drawn over a packing piece 56 for the retaining rail 39, and is secured to a retaining piece 57 having a bevelled lower surface which is disposed on the inner side of the packing piece.

The slot 42 in the lower edge of the door is so formed that it has a width corresponding to the width of the hollow rail 41 serving to guide the retaining rail 39.

I claim:

1. A draught excluding device for doors including in combination a door jamb, a door having a groove in its lower edge, a draught excluder strip guided in said groove, a lock on said door including an operating plate, a retractable abutment guided in said lock, a jamb-plate cooperating with said abutment, a door latch mounted in said lock and adapted to engage in said jamb-plate, means to displace said latch in said lock, catch means interconnecting said abutment and said latch in one direction of movement only, and a locking lever operated by said abutment rendering said interconnecting means ineffective.

2. A draught excluding device for doors including in combination a door jamb, a door having a groove in its lower edge, a draught excluder strip guided in said groove, a lock on said door including an operating plate, a retractable abutment guided in said look, a jamb-plate cooperating with said abutment, a door latch mounted in said lock and adapted to engage in said jamb-plate, means to displace said latch in said lock, catch means interconnecting said abutment and said latch in one direction of movement only, a spring restraining the movement of said catch means, and means operated by said abutment rendering said catch means ineffective.

3. A draught excluding device including in combination, a guided latch, a draught excluding strip, means to guide said strip in the plane of a door, a draught excluderstrip operating plate, means to retract said latch, means interconnecting said retraction means and said operating plate in one direction of movement, a spring opposing said interconnecting means in this direction alone, an abutment guided in said lock, and a locking lever operated by said abutment to lock the draught excluder operating means in the position in which it is displaced by its connection with the latch operating means.

4. As an article of manufacture, a device for operating a draught excluder strip, consisting of a lock having a latch, means to displace said latch, an element on said lock for displacing said excluder strip, an abutment displaceably guided in said lock, means connecting said element displacing means and said latch displacement means in one direction of movement only, a spring acting oppositely thereto, an abutment guided in said lock, and a locking lever controlled by said abutment to lock said element displacement means in its displaced position.

5. A draught excluding device consisting in combination of a door, a lock mounted on said door, a latch guided in said lock, a door jamb having a socket for said latch, an abutment guided in said lock non-coincident with the notch in the jamb-plate, spring means thrusting said abutment outwardly from said lock, a draught excluder strip guided on said door, means to displace said strip relatively to said door, means to operate said latch, means to interconnect said latch operating means with said strip displacing means, and means operated by said abutment interrupting the interconnection of the said latch operating means and the strip operating means.

6. A draught excluding device including a lock having a latch guided therein, an abutment guided on said latch, means coupling said latch and said abutment in one direction of movement alone, means to operate said latch, a draught excluder strip, means to guide said strip in the plane of a door, means to displace said strip, and a locking lever operated by said abutment to lock said displacement means in one end position.

7. A draught excluding device including a lock having a latch guided therein, an abutment guided on said latch, means coupling said latch and said abutment in one direction of movement alone, means to operate said latch, a draught excluder strip, means to guide said strip in the plane of a door, means to displace said strip, means operated by said abutment to lock said displacement means in one end position, and spring means to restrict movement of said latch.

8. A draught excluding device comprising in combination, a lock casing, a latch guided in said casing, a latch operating plate mounted on said casing, a draught excluder strip, means to guide said strip on a door, a strip displacing plate, means connecting said plate and said strip, lost motion connection means between said strip displacing plate, and said latch operating plate, a spring tending to absorb said lost motion, an abutment guided in said lock casing, locking means for said latch operating plate, means operated by said abutment releasing said locking means, and means interconnecting said abutment and said latch.

9. A draught excluding device including a door, a doorjamb, a draught excluder strip, guide means for said strip in the plane of the door, a lock casing on said door, a latch guided in said lock casing, a jamb-plate having a notch to receive said latch, an abutment guided in said lock casing non-coincident with the notch in the jamb plate, a latch operating plate, an excluder strip operating plate, means to displace said excluder latch operating plate from said latch operating plate, a lever pivoted to said lock casing, a spring controlling said lever, means interconnecting said lever and said latch, abutment means between said lever and said strip operating plate, and locking means for said strip operating plate and operated by said abutment.

References Cited in the file of this patent UNITED STATES PATENTS 323,658 Gambllee Aug. 4, 1885 463,886 Blackwood et al Nov. 24, 1891 479,973 Chase Aug. 2, 1892 974,959 Gotte Nov. 8, 1910 994,868 Newpher June 13, 1911 1,005,114 Hamlin Oct. 3, 1911 1,009,879 Ackerman Nov. 28, 1911 1,213,103 Hudson Jan. 16, 1917 1,597,682 Hagstrom Aug. 31, 1926 2,142,753 Hulcher Jan. 3, 1939 2,445,315 Curley July 20, 1948 2,523,070 Smalley Sept. 19, 1950 FOREIGN PATENTS 166,123 Switzerland Mar. 1, 1934 

